Pocket Tactics is a free download and print on your 3D printer game.
I think this is the wave of the future.
fantasy
GURPS Treasure Generator
For GURPS players, here is an online automated treasure generator.
Mythosa Fantasy Role Playing World
Mythosa is a free fantasy role playing world for any RPG system. It’s a very complete work, and cold be used right out of the box.
Table Top Quidditch
Table Top Quidditch is a set of free wargames rules for playing the favorite sport of wizards.
Wilderland Middle Earth Skirmish Rules
Wilderland is a set of free wargames rules for skirmish games set in J.R.R. Tolkien’s Middle Earth.